Screen



Oct. 26,1926. 1, 04,490

' E. C. SHILEY SCREEN Filed May 26, 1925 3 Sheets-Sheet 1 Oct. 26 1926.

E. C. SHILEY SCREEN Filed May 26, 1925 3 Sheets-Sheet 2 Patented Oct. 26, 1926.

UNITED STATES PATENT oFrIcE.

v ELMEB C. SHILEY, 01' HOUN'IU'NION, PENNSYLVANIA, ASSIGNOR 0F ONE-HALF TO LUDEN K. GEILCOTE, OF MOUNT UNION, PENN BYLVAN IA.

scannn.

Application filed Kay 86, 1988. Serial No. 32,995.

( This invention aims to provide a simple means whereby material of an desired sort ma be screened rapidly an thoroughly, wit a minimum expenditure of power, the device being so constructed that it W111 withstand the severe use to which riddles and screens are subjected.

It is within the province of the disclosure to improve generally and to enhance the utility of devices of that sort to which the invention appertains.

Although a preferred form has been shown in the drawin it will be understood that a mechanic, wor ing within the scope of what is claimed, may make such changes as his skill may sug est, without departing from the spirit of t e invention.

In the accompanwing drawmgsz- Figure 1 shows in top plan, a machine constructedin accordance with the mventron; Figure 2 is a side elevat on; Figure 3 1s a fragmental section taken about on the hue 33 of Figure 2; Figure 4 is a sectlonal view disclosing one of the eccentr cs and at- .tendant parts; Figure 5 is asection on the line 5-5 of Figure 2; Figure 6 1s a section on the line 6-6 of Flgure 2. i

The device forming the subject matter of this application comprises four mam parts, to wit, a support, a, screen carrier, mecha nism for mounting the carrier yleldably and for governing its movements, and means for operating the carrier.

The support.

The support 1 includes side members in the form 'ofplates 2 provided at the1r lower I edges with outstanding angle members 3 connected by cross bars 4, the plates 2 carrying,

at their upper edges, inwardly extending.

angle mem ers 5. The plates 2 have openings 10. The plates 2 are connected at one end by a cross piece 14. There are bearings 30 on the angle members 5.

The screen earn'er.

serving to retain the material on the screen 7. Depending posts 8 are connected at their upper ends to the sides of the screen frame 6 and .at their lower ends to cross pieces 9 movable in the openings 10 of the frame plates 2 and joined at their outer ends to longitudinal bars 11 located externally of the frame plates 2. Standards 12 are mounted on the outer bars 11 intermediate the ends thereof. Each standard 12 is a composlte structure and includes a base 15 and a two-part casing 16, the constituent Mounting mechanism for the carrier.

The mounting mechanism for the screen carrier comprises compression springs 21 interposed between the lower flanges of the anglemembers 3 and the outer longitudinal bars 11 of the screen carrier, the springs bespecified. Adjustable steps 24, in the form of rods, are threaded into the bars 11 and cooperate with the angle members 3. The stops 24 are held in adjusted positions by nuts 25 threaded on the stops and cooperating with the bars 11. A retractile spring 26 is connected at one end to the cross piece 14 of the support, as shown at 27, and is connected at its other end, as indicated at 28, with the uppermost cross piece 9 of the screen carrier, the screen carrier and the support slanting downwardly, and longitudinally, as clearly shown in Figure 2.

The operating means.

The operating means embodies a shaft 29 way into the casings 16, tubular guards 31 ing held in place by bosses 23 on the parts are held by constricting rings 32 on the centrics coact with straps 36, the stems 37 of which are mounted on-pivot elements 38 carried by the upper portions of the stand ards 12.

Duphcation.

The structure above described may be duplicated, as shown at 47 any desired number oftimes, and as to the duplicated mechanism, it is necessary to state merely that 1t includes a shaft 48 carrying a pulley 49 connected operatively with the pulley 34 by a belt 40-although some other means for imparting rotation from the shaft 29 to the shaft 48 might be used. The material to be screened passes from the screen 7 of one umt of the machine, to the screen of the next unit, over a bridge 50 which may be a short screen 51 carried by a frame52.

Operation.

at 38 to the standards 12 of the screen carrier. When the screen carrier is operated and the material moves downwardly along the screen 7, the material passes over the bridge 50 from one part of the machine to the other. The spring 26 prevents the screen carrier from moving too far dow ill and the springs 21 support the carrier yieldingly. Any desired ones of the stop screws 24 may be advanced or retracted and be held in place by the adjustin nuts 25, so that some of the stop screws will strike the base flange of the angle members 3 before others of the stop screws. The result is that the character of the movement imparted to the screen 7,

and the extent of that movement, may be varied at the will of an operator, depending upon the nature of the material to be screened, and upon other conditions. When a proper amount of oil is placed in the casings 16, theeccentrics 35 and the straps 36 will be lubricated adequately, as will also the pivot bolts 38 for the straps, and some of the oil will find its way upon the shaft 29, to lubricate the shaft where it turns in the bearings 30. The device shown and described will screen material rapidly and,

thoroughly, even though the material be wet, and will do so with a small expenditure of power, and with reduced wear upon working parts.

By way of summary, it may be stated that, among other combinations, the device comprises a support, and a screen carrier, which may be denominated cooperating parts of the device, mechanism such as the shaft 29, the eccentrics 35 and the straps 36, being provided for imparting movement to the carrier, stops 24 being mounted on one of said cooperating parts, namely the carrier, the stops being so' positioned as to enga e the other of said cooperating parts, to wit, the support, and thestops being held in adjusted positions, by the nuts 25, thereby to vary the effective length of the stops and. to vary the movement imparted to the carrier by the operating mechanism.

Especial attention is called to the purpose of the spring 26. In the first place, it should be noted that a spring is not absolutely .ess'ential. Anything may be used which will support or retain theiscreen carrier and obviate the necessity for any additional support at the lower end of the carrier. As a matter of fact, contact between the carrier and some object at the lower end of the carrier would interfere with the operation of the device during the screening operation. The machine generally is set at a pitch of about thirty to thirty-four degrees, and, consequently, the carrier will have a tendency to lean down hill unless supported by the part 26 or its mechanical equivalent. Any suitable means, located at the point 26 may be provided for holding the carrier in proper position with respect to the springs 21, thus insuring effectiveness Whilst the screen carrieris vibrating.

I claim 1. In a device of the class described, a support including side members having openings and provided with outstanding lower flanges, a screen carrier between the side members, cross pieces on the screen carrier and extended through the openings, bars connecting thecross pieces and located outwardly of'the side members, at the sides thereof, compression springs interposed be tween the bars and the flanges, stops coacting with the flanges and the bars, and means for mounting the stops adjustably in one of the said parts wherewith they coact, standards on the bars, a shaft journaled on the side members, eccentrics on the shaft, and straps cooperating with the eccentrics and pivoted to the standards.

2. In a device of the class described, cooperating parts including side members and bars located outwardly of the side members and between the upper and lower edges thereof, stops adjustably mounted in one of said cooperating parts, and engaging the other of said cooperating parts to limit the movement of the bars in a direction parallel to the side members, compression springs engaged at their upper ends with the bars and engaged at their lower ends with the side members, a screen carried between the side members, and provided adwith the bars to secure a vertical shaking jacent to its ends with lateral projections, movement of the screen carrier when the the side members having openings through shaft is rotated. 10 which the projections extend, the projections In testimon that I claim the foregoing .5 being connected to the bars, a shaft snpas my own, I ave hereto afiixed my signaported on the side members for rotation, and ture. means for connecting the shaft operatively ELMER C. SHILEY. 

